http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-107694354-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D61-145 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D67-0006 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B01D71-34 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D61-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D67-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01D71-34 |
| filingDate | 2017-09-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-107694354-B |
| titleOfInvention | Polyvinylidene fluoride ultrafiltration membrane surface modification method |
| abstract | The invention relates to a surface modification method of a polyvinylidene fluoride ultrafiltration membrane, which comprises the following steps: performing alkali treatment on the PVDF ultrafiltration membrane to form C ═ C double bonds on the surface of the PVDF membrane, and then performing negative charge treatment to obtain SO-bearing particles 3 ‑ And finally, carrying out a sulphation reaction on the ionic PVDF membrane to obtain the surface modified PVDF ultrafiltration membrane. The PVDF ultrafiltration membrane obtained by the modification method provided by the invention has a large amount of positive charges on the surface, compared with the unmodified PVDF ultrafiltration membrane, the desalination rate (metal ion resistance) is improved by at least 6 times, the anti-pollution performance of membrane filaments is obviously improved, the service life is longer, and the modification method has the advantages of low cost, space saving, simple method and easy industrialization. |
| priorityDate | 2017-09-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.